Hi Stefan, czw., 28 mar 2024 o 00:33 Stefan Lengfeld <stefan@xxxxxxxxxxxx> napisał(a): > It's possible and already done to implement a kernel watchdog driver and > combine all the functionalites (gpio expander, interrupt controller and > watchdog) in a multi-function device (MFD)[1], > [1]: https://bootlin.com/pub/conferences/2015/elce/belloni-mfd-regmap-syscon/belloni-mfd-regmap-syscon.pdf This is even more information than I could expect, and that's totally satisfying for me, I'll also explore MFD devices a bit more, as I have a feeling that I've already seen something like this in the tps65086 device driver. Best regards, Patryk